*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/* 去掉列表的圆点 */
ul,ol,li {
    list-style: none;
}

img {
    vertical-align: middle;
}

/* 设置a标签的样式 */
a {
    text-decoration: none;
}
/* 加入媒体查询 */
@media only screen and (device-width:320px) {
    html {
        font-size: 16px;
    }

}

@media only screen and (device-width:375px) {
    html {
        font-size: 18.75px;
    }

}

@media only screen and (device-width:414px) {
    html {
        font-size: 20.7px;
    }

}

@media only screen and (device-width:360px) {
    html {
        font-size: 18px;
    }

}
@rem:16rem;
